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To date, a number of solid-phase syntheses of 4(3H)-quinazolinones [171], quinazoline-2,4-diones including monothioxo analogs [172,173], quinazo-lines [174,175], and dihydroquinazolines [176-178] have been developed. As a recent example, synthesis of 2-arylamino-3,4-dihydroquinazolines (56) by